haskell | bits

Haskell Evaluation

Oct 21, 2014 · 3 min read · haskell programming

Conditional evaluation -- file: ch02/myDrop.hs myDrop n xs = if n <= 0 || null xs then xs else myDrop (n - 1) (tail xs) The if keyword introduces an expression that has three components. An expression of type Bool, immediately following the if. We refer to this as a predicate. A then keyword, followed by anot…

Haskell - Functions, Overloading, Pattern Matching, Variables

Oct 20, 2014 · 7 min read · haskell programming

III. Functions Function application is left associative The expression a b c d is equivalent to (((a b) c) d) If we want to use one expression as an argument to another, we have to use explicit parentheses to tell the parser what we really mean Defining and calling functions is simple add a b = a + b ad…

Haskell - Expressions, Basic Types, Composite Data Types

Oct 19, 2014 · 5 min read · haskell programming

Every expression and function in Haskell has a type. Types in Haskell are: Strong Static Can be automatically inferred. True has the type Bool 'foo' is of type String 1 has type Num Type are important for abstraction. To add meaning to some bytes. The meaning cannot change after the type has been defined. The be…

Haskell - Introducere

Oct 18, 2014 · 3 min read · haskell programming

Haskell e un limbaj de progamare functionala, spre deosebire de C/C++, Visual Basic, Java care sunt imperative.Programarea functionala poate fi vazuta ca un stil de programare in care principala metoda de calcul o reprezinta aplicarea de functii asupra unor argumente. Numele de programare funcţională provine din faptu…